Well, that's eBay for ya!
I would refer to the Transgo site and ask them first. They say the 45RFE kit is upgraded to fit the 68RFE, but no mention of diesel anything.
NOTICE: This kit contains an electrical part (Resistor) which is not compatible with aftermarket engine programmers that modify the transmission hydraulic pressure.
I suppose it might be just fine. Let the buyer beware...